125161589 has 4 divisors (see below), whose sum is σ = 143041824. Its totient is φ = 107281356.

The previous prime is 125161571. The next prime is 125161637. The reversal of 125161589 is 985161521.

It is a semiprime because it is the product of two primes, and also a Blum integer, because the two primes are equal to 3 mod 4, and also an emirpimes, since its reverse is a distinct semiprime: 985161521 = 79 ⋅12470399.

It is not a de Polignac number, because 125161589 - 2²⁰ = 124113013 is a prime.

It is a super-2 number, since 2×125161589² = 31330846722009842, which contains 22 as substring.

It is a Duffinian number.

It is a Curzon number.

It is a congruent number.

It is not an unprimeable number, because it can be changed into a prime (125161529) by changing a digit.

It is a polite number, since it can be written in 3 ways as a sum of consecutive naturals, for example, 8940107 + ... + 8940120.

It is an arithmetic number, because the mean of its divisors is an integer number (35760456).

Almost surely, 2^125161589 is an apocalyptic number.

It is an amenable number.

125161589 is a deficient number, since it is larger than the sum of its proper divisors (17880235).

125161589 is an equidigital number, since it uses as much as digits as its factorization.

125161589 is an evil number, because the sum of its binary digits is even.

The sum of its prime factors is 17880234.

The product of its digits is 21600, while the sum is 38.

The square root of 125161589 is about 11187.5640333363. The cubic root of 125161589 is about 500.2153592275.

The spelling of 125161589 in words is "one hundred twenty-five million, one hundred sixty-one thousand, five hundred eighty-nine".